$(FILENAME)\
You know when each filename is unique, each folder will be unique too right? You're telling it to include the filename as part of the folder name. If that's what you want then that's great but I don't think that's what you want. This is why two different files with two different filenames end up in two different folders.
If you're just downloading individual files, right click "Download to folder named for Subject" might be better than trying to use the path parameters. On the other hand if you download entire blocks of files including the PAR file, using "$(SUBJECT) in the unrar path will move them all to a folder named for the subject when they're checked and repaired. For and organizational stand point, I'd prefer to download blocks of files with pars like this so they all end up in the same folder.